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  "retrievedAt": "2026-08-24T19:46:53.218Z",
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    "text": "The current evidence robustly supports that four-day-week trials improve well-being and retention, but it does not establish that the four-day week raises measured productivity; the productivity claim rests on self-selected, self-reported, short-run data without randomized controls."
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      "text": "In the large multi-country four-day-week pilots conducted to date, participating firms report improved worker well-being, reduced burnout, and maintained or self-rated-higher performance, and roughly 90% of them choose to continue the arrangement.",
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      "text": "The largest study did not analyse company-wide productivity, and its outcomes were self-reported, so workers and firms motivated to keep the extra day off may have overstated benefits; the authors themselves call for randomized studies.",
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